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freebsd/sys/i4b/layer3/i4b_q931.c

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/*-
* Copyright (c) 1997, 2002 Hellmuth Michaelis. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*---------------------------------------------------------------------------
*
* i4b_q931.c - Q931 received messages handling
* --------------------------------------------
* last edit-date: [Sun Aug 11 19:18:08 2002]
*
*---------------------------------------------------------------------------*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <machine/i4b_debug.h>
#include <machine/i4b_ioctl.h>
#include <machine/i4b_cause.h>
#include <i4b/include/i4b_isdnq931.h>
#include <i4b/include/i4b_l3l4.h>
#include <i4b/include/i4b_global.h>
#include <i4b/layer3/i4b_l3.h>
#include <i4b/layer3/i4b_l3fsm.h>
#include <i4b/layer3/i4b_q931.h>
#include <i4b/layer4/i4b_l4.h>
unsigned int i4b_l3_debug = L3_DEBUG_DEFAULT;
ctrl_desc_t ctrl_desc[MAX_CONTROLLERS]; /* controller description array */
int utoc_tab[MAX_CONTROLLERS]; /* unit to controller conversion */
/* protocol independent causes -> Q.931 causes */
unsigned char cause_tab_q931[CAUSE_I4B_MAX] = {
CAUSE_Q850_NCCLR, /* CAUSE_I4B_NORMAL -> normal call clearing */
CAUSE_Q850_USRBSY, /* CAUSE_I4B_BUSY -> user busy */
CAUSE_Q850_NOCAVAIL, /* CAUSE_I4B_NOCHAN -> no circuit/channel available*/
CAUSE_Q850_INCDEST, /* CAUSE_I4B_INCOMP -> incompatible destination */
CAUSE_Q850_CALLREJ, /* CAUSE_I4B_REJECT -> call rejected */
CAUSE_Q850_DSTOOORDR, /* CAUSE_I4B_OOO -> destination out of order */
CAUSE_Q850_TMPFAIL, /* CAUSE_I4B_TMPFAIL -> temporary failure */
CAUSE_Q850_USRBSY, /* CAUSE_I4B_L1ERROR -> L1 error / persistent deact XXX */
CAUSE_Q850_USRBSY, /* CAUSE_I4B_LLDIAL -> no dialout on leased line XXX */
};
/*---------------------------------------------------------------------------*
* setup cr ref flag according to direction
*---------------------------------------------------------------------------*/
unsigned char
setup_cr(call_desc_t *cd, unsigned char cr)
{
if(cd->crflag == CRF_ORIG)
return(cr & 0x7f); /* clear cr ref flag */
else if(cd->crflag == CRF_DEST)
return(cr | 0x80); /* set cr ref flag */
else
panic("setup_cr: invalid crflag!\n");
}
/*---------------------------------------------------------------------------*
* decode and process a Q.931 message
*---------------------------------------------------------------------------*/
void
i4b_decode_q931(int unit, int msg_len, u_char *msg_ptr)
{
call_desc_t *cd;
int codeset = CODESET_0;
int old_codeset = CODESET_0;
int shift_flag = UNSHIFTED;
int crlen = 0;
int crval = 0;
int crflag = 0;
int i;
int offset;
int s;
/* check protocol discriminator */
if(*msg_ptr != PD_Q931)
{
static int protoflag = -1; /* print only once .. */
if(*msg_ptr != protoflag)
{
NDBGL3(L3_P_ERR, "unknown protocol discriminator 0x%x!", *msg_ptr);
protoflag = *msg_ptr;
}
return;
}
msg_ptr++;
msg_len--;
s = SPLI4B(); /* this has to be protected ! */
/* extract call reference */
crlen = *msg_ptr & CRLENGTH_MASK;
msg_ptr++;
msg_len--;
if(crlen != 0)
{
crval += *msg_ptr & 0x7f;
crflag = (*msg_ptr >> 7) & 0x01;
msg_ptr++;
msg_len--;
for(i=1; i < crlen; i++)
{
crval += *msg_ptr;
msg_ptr++;
msg_len--;
}
}
else
{
crval = 0;
crflag = 0;
}
NDBGL3(L3_P_MSG, "Call Ref, len %d, val %d, flag %d", crlen, crval, crflag);
/* find or allocate calldescriptor */
if((cd = cd_by_unitcr(unit, crval,
crflag == CRF_DEST ? CRF_ORIG : CRF_DEST)) == NULL)
{
if(*msg_ptr == SETUP)
{
/* get and init new calldescriptor */
cd = reserve_cd(); /* cdid filled in */
cd->controller = utoc_tab[unit];
cd->cr = crval;
cd->crflag = CRF_DEST; /* we are the dest side */
cd->ilt = NULL; /* reset link tab ptrs */
cd->dlt = NULL;
}
else
{
/*XXX*/ if(crval != 0) /* ignore global call references */
{
NDBGL3(L3_P_ERR, "cannot find calldescriptor for cr = 0x%x, crflag = 0x%x, msg = 0x%x, frame = ", crval, crflag, *msg_ptr);
i4b_print_frame(msg_len, msg_ptr);
}
splx(s);
return;
}
}
splx(s);
/* decode and handle message type */
i4b_decode_q931_message(unit, cd, *msg_ptr);
msg_ptr++;
msg_len--;
/* process information elements */
while(msg_len > 0)
{
/* check for shift codeset IE */
if((*msg_ptr & 0x80) && ((*msg_ptr & 0xf0) == SOIE_SHIFT))
{
if(!(*msg_ptr & SHIFT_LOCK))
shift_flag = SHIFTED;
old_codeset = codeset;
codeset = *msg_ptr & CODESET_MASK;
if((shift_flag != SHIFTED) &&
(codeset <= old_codeset))
{
NDBGL3(L3_P_ERR, "Q.931 lockingshift proc violation, shift %d -> %d", old_codeset, codeset);
codeset = old_codeset;
}
msg_len--;
msg_ptr++;
}
/* process one IE for selected codeset */
switch(codeset)
{
case CODESET_0:
offset = i4b_decode_q931_cs0_ie(unit, cd, msg_len, msg_ptr);
msg_len -= offset;
msg_ptr += offset;
break;
default:
NDBGL3(L3_P_ERR, "unknown codeset %d, ", codeset);
i4b_print_frame(msg_len, msg_ptr);
msg_len = 0;
break;
}
/* check for non-locking shifts */
if(shift_flag == SHIFTED)
{
shift_flag = UNSHIFTED;
codeset = old_codeset;
}
}
next_l3state(cd, cd->event);
}
/*---------------------------------------------------------------------------*
* decode and process one Q.931 codeset 0 information element
*---------------------------------------------------------------------------*/
int
i4b_decode_q931_cs0_ie(int unit, call_desc_t *cd, int msg_len, u_char *msg_ptr)
{
int i, j;
char *p;
switch(*msg_ptr)
{
/*********/
/* Q.931 */
/*********/
/* single byte IE's */
case IEI_SENDCOMPL:
NDBGL3(L3_P_MSG, "IEI_SENDCOMPL");
return(1);
break;
/* multi byte IE's */
case IEI_SEGMMSG: /* segmented message */
NDBGL3(L3_P_MSG, "IEI_SEGMENTED_MESSAGE");
break;
case IEI_BEARERCAP: /* bearer capability */
switch(msg_ptr[2])
{
case 0x80: /* speech */
case 0x89: /* restricted digital info */
case 0x90: /* 3.1KHz audio */
/* XXX */ cd->bprot = BPROT_NONE;
NDBGL3(L3_P_MSG, "IEI_BEARERCAP - Telephony");
break;
case 0x88: /* unrestricted digital info */
/* XXX */ cd->bprot = BPROT_RHDLC;
NDBGL3(L3_P_MSG, "IEI_BEARERCAP - Raw HDLC");
break;
default:
/* XXX */ cd->bprot = BPROT_NONE;
NDBGL3(L3_P_ERR, "IEI_BEARERCAP - Unsupported B-Protocol 0x%x", msg_ptr[2]);
break;
}
break;
case IEI_CAUSE: /* cause */
if(msg_ptr[2] & 0x80)
{
cd->cause_in = msg_ptr[3] & 0x7f;
NDBGL3(L3_P_MSG, "IEI_CAUSE = %d", msg_ptr[3] & 0x7f);
}
else
{
cd->cause_in = msg_ptr[4] & 0x7f;
NDBGL3(L3_P_MSG, "IEI_CAUSE = %d", msg_ptr[4] & 0x7f);
}
break;
case IEI_CALLID: /* call identity */
NDBGL3(L3_P_MSG, "IEI_CALL_IDENTITY");
break;
case IEI_CALLSTATE: /* call state */
cd->call_state = msg_ptr[2] & 0x3f;
NDBGL3(L3_P_MSG, "IEI_CALLSTATE = %d", cd->call_state);
break;
case IEI_CHANNELID: /* channel id */
if((msg_ptr[2] & 0xf4) != 0x80)
{
cd->channelid = CHAN_NO;
NDBGL3(L3_P_ERR, "IEI_CHANNELID, unsupported value 0x%x", msg_ptr[2]);
}
else
{
switch(msg_ptr[2] & 0x03)
{
case IE_CHAN_ID_NO:
cd->channelid = CHAN_NO;
break;
case IE_CHAN_ID_B1:
cd->channelid = CHAN_B1;
break;
case IE_CHAN_ID_B2:
cd->channelid = CHAN_B2;
break;
case IE_CHAN_ID_ANY:
cd->channelid = CHAN_ANY;
break;
}
cd->channelexcl = (msg_ptr[2] & 0x08) >> 3;
NDBGL3(L3_P_MSG, "IEI_CHANNELID - channel %d, exclusive = %d", cd->channelid, cd->channelexcl);
/* if this is a setup message, reserve channel */
if(cd->event == EV_SETUP)
{
if((cd->channelid == CHAN_B1) || (cd->channelid == CHAN_B2))
{
if(ctrl_desc[cd->controller].bch_state[cd->channelid] == BCH_ST_FREE)
ctrl_desc[cd->controller].bch_state[cd->channelid] = BCH_ST_RSVD;
else
NDBGL3(L3_P_ERR, "IE ChannelID, Channel NOT free!!");
}
else if(cd->channelid == CHAN_NO)
{
NDBGL3(L3_P_MSG, "IE ChannelID, SETUP with channel = No channel (CW)");
}
else /* cd->channelid == CHAN_ANY */
{
NDBGL3(L3_P_ERR, "ERROR: IE ChannelID, SETUP with channel = Any channel!");
}
}
}
break;
case IEI_PROGRESSI: /* progress indicator */
NDBGL3(L3_P_MSG, "IEI_PROGRESSINDICATOR");
break;
case IEI_NETSPCFAC: /* network specific fac */
NDBGL3(L3_P_MSG, "IEI_NETSPCFAC");
break;
case IEI_NOTIFIND: /* notification indicator */
NDBGL3(L3_P_MSG, "IEI_NOTIFICATION_INDICATOR");
break;
case IEI_DISPLAY: /* display */
memcpy(cd->display, &msg_ptr[2], min(DISPLAY_MAX, msg_ptr[1]));
cd->display[min(DISPLAY_MAX, msg_ptr[1])] = '\0';
NDBGL3(L3_P_MSG, "IEI_DISPLAY = %s", cd->display);
break;
case IEI_DATETIME: /* date/time */
i = 2;
j = msg_ptr[1];
p = &(cd->datetime[0]);
*p = '\0';
for(j = msg_ptr[1]; j > 0; j--, i++)
sprintf(p+strlen(p), "%02d", msg_ptr[i]);
NDBGL3(L3_P_MSG, "IEI_DATETIME = %s", cd->datetime);
break;
case IEI_KEYPAD: /* keypad facility */
NDBGL3(L3_P_MSG, "IEI_KEYPAD_FACILITY");
break;
case IEI_SIGNAL: /* signal type */
NDBGL3(L3_P_MSG, "IEI_SIGNAL = %d", msg_ptr[2]);
break;
case IEI_INFRATE: /* information rate */
NDBGL3(L3_P_MSG, "IEI_INFORMATION_RATE");
break;
case IEI_ETETDEL: /* end to end transit delay */
NDBGL3(L3_P_MSG, "IEI_END_TO_END_TRANSIT_DELAY");
break;
case IEI_CUG: /* closed user group */
NDBGL3(L3_P_MSG, "IEI_CLOSED_USER_GROUP");
break;
case IEI_CALLINGPN: /* calling party no */
if(msg_ptr[2] & 0x80) /* no presentation/screening indicator ? */
{
memcpy(cd->src_telno, &msg_ptr[3], min(TELNO_MAX, msg_ptr[1]-1));
cd->src_telno[min(TELNO_MAX, msg_ptr[1] - 1)] = '\0';
cd->scr_ind = SCR_NONE;
cd->prs_ind = PRS_NONE;
}
else
{
memcpy(cd->src_telno, &msg_ptr[4], min(TELNO_MAX, msg_ptr[1]-2));
cd->src_telno[min(TELNO_MAX, msg_ptr[1] - 2)] = '\0';
cd->scr_ind = (msg_ptr[3] & 0x03) + SCR_USR_NOSC;
cd->prs_ind = ((msg_ptr[3] >> 5) & 0x03) + PRS_ALLOWED;
}
/* type of number (source) */
switch ((msg_ptr[2] & 0x70) >> 4)
{
case 1:
cd->src_ton = TON_INTERNAT;
break;
case 2:
cd->src_ton = TON_NATIONAL;
break;
default:
cd->src_ton = TON_OTHER;
break;
}
NDBGL3(L3_P_MSG, "IEI_CALLINGPN = %s", cd->src_telno);
break;
case IEI_CALLINGPS: /* calling party subaddress */
memcpy(cd->src_subaddr, &msg_ptr[3], min(SUBADDR_MAX, msg_ptr[1]-1));
cd->src_subaddr[min(SUBADDR_MAX, msg_ptr[1] - 1)] = '\0';
NDBGL3(L3_P_MSG, "IEI_CALLINGPS = %s", cd->src_subaddr);
break;
case IEI_CALLEDPN: /* called party number */
memcpy(cd->dst_telno, &msg_ptr[3], min(TELNO_MAX, msg_ptr[1]-1));
cd->dst_telno[min(TELNO_MAX, msg_ptr[1] - 1)] = '\0';
/* type of number (destination) */
switch ((msg_ptr[2] & 0x70) >> 4)
{
case 1:
cd->dst_ton = TON_INTERNAT;
break;
case 2:
cd->dst_ton = TON_NATIONAL;
break;
default:
cd->dst_ton = TON_OTHER;
break;
}
NDBGL3(L3_P_MSG, "IEI_CALLED = %s", cd->dst_telno);
break;
case IEI_CALLEDPS: /* called party subaddress */
memcpy(cd->dst_subaddr, &msg_ptr[3], min(SUBADDR_MAX, msg_ptr[1]-1));
cd->dst_subaddr[min(SUBADDR_MAX, msg_ptr[1] - 1)] = '\0';
NDBGL3(L3_P_MSG, "IEI_CALLEDPS = %s", cd->dst_subaddr);
break;
case IEI_REDIRNO: /* redirecting number */
NDBGL3(L3_P_MSG, "IEI_REDIRECTING_NUMBER");
break;
case IEI_TRNSEL: /* transit network selection */
NDBGL3(L3_P_MSG, "IEI_TRANSIT_NETWORK_SELECTION");
break;
case IEI_RESTARTI: /* restart indicator */
NDBGL3(L3_P_MSG, "IEI_RESTART_INDICATOR");
break;
case IEI_LLCOMPAT: /* low layer compat */
NDBGL3(L3_P_MSG, "IEI_LLCOMPAT");
break;
case IEI_HLCOMPAT: /* high layer compat */
NDBGL3(L3_P_MSG, "IEI_HLCOMPAT");
break;
case IEI_USERUSER: /* user-user */
NDBGL3(L3_P_MSG, "IEI_USER_USER");
break;
case IEI_ESCAPE: /* escape for extension */
NDBGL3(L3_P_MSG, "IEI_ESCAPE");
break;
/*********/
/* Q.932 */
/*********/
case IEI_FACILITY: /* facility */
NDBGL3(L3_P_MSG, "IEI_FACILITY");
if(i4b_aoc(msg_ptr, cd) > -1)
i4b_l4_charging_ind(cd);
break;
/*********/
/* Q.95x */
/*********/
case IEI_CONCTDNO: /* connected number */
NDBGL3(L3_P_MSG, "IEI_CONCTDNO");
break;
default:
NDBGL3(L3_P_ERR, "Unknown IE %d - ", *msg_ptr);
i4b_print_frame(msg_ptr[1]+2, msg_ptr);
break;
}
return(msg_ptr[1] + 2);
}
/*---------------------------------------------------------------------------*
* decode and process one Q.931 codeset 0 information element
*---------------------------------------------------------------------------*/
void
i4b_decode_q931_message(int unit, call_desc_t *cd, u_char message_type)
{
char *m = NULL;
cd->event = EV_ILL;
switch(message_type)
{
/* call establishment */
case ALERT:
cd->event = EV_ALERT;
m = "ALERT";
break;
case CALL_PROCEEDING:
cd->event = EV_CALLPRC;
m = "CALL_PROCEEDING";
break;
case PROGRESS:
cd->event = EV_PROGIND;
m = "PROGRESS";
break;
case SETUP:
m = "SETUP";
cd->bprot = BPROT_NONE;
cd->cause_in = 0;
cd->cause_out = 0;
cd->dst_telno[0] = '\0';
cd->src_telno[0] = '\0';
cd->channelid = CHAN_NO;
cd->channelexcl = 0;
cd->display[0] = '\0';
cd->datetime[0] = '\0';
cd->event = EV_SETUP;
break;
case CONNECT:
m = "CONNECT";
cd->datetime[0] = '\0';
cd->event = EV_CONNECT;
break;
case SETUP_ACKNOWLEDGE:
m = "SETUP_ACKNOWLEDGE";
cd->event = EV_SETUPAK;
break;
case CONNECT_ACKNOWLEDGE:
m = "CONNECT_ACKNOWLEDGE";
cd->event = EV_CONACK;
break;
/* call information */
case USER_INFORMATION:
m = "USER_INFORMATION";
break;
case SUSPEND_REJECT:
m = "SUSPEND_REJECT";
break;
case RESUME_REJECT:
m = "RESUME_REJECT";
break;
case HOLD:
m = "HOLD";
break;
case SUSPEND:
m = "SUSPEND";
break;
case RESUME:
m = "RESUME";
break;
case HOLD_ACKNOWLEDGE:
m = "HOLD_ACKNOWLEDGE";
break;
case SUSPEND_ACKNOWLEDGE:
m = "SUSPEND_ACKNOWLEDGE";
break;
case RESUME_ACKNOWLEDGE:
m = "RESUME_ACKNOWLEDGE";
break;
case HOLD_REJECT:
m = "HOLD_REJECT";
break;
case RETRIEVE:
m = "RETRIEVE";
break;
case RETRIEVE_ACKNOWLEDGE:
m = "RETRIEVE_ACKNOWLEDGE";
break;
case RETRIEVE_REJECT:
m = "RETRIEVE_REJECT";
break;
/* call clearing */
case DISCONNECT:
m = "DISCONNECT";
cd->event = EV_DISCONN;
break;
case RESTART:
m = "RESTART";
break;
case RELEASE:
m = "RELEASE";
cd->event = EV_RELEASE;
break;
case RESTART_ACKNOWLEDGE:
m = "RESTART_ACKNOWLEDGE";
break;
case RELEASE_COMPLETE:
m = "RELEASE_COMPLETE";
cd->event = EV_RELCOMP;
break;
/* misc messages */
case SEGMENT:
m = "SEGMENT";
break;
case FACILITY:
m = "FACILITY";
cd->event = EV_FACILITY;
break;
case REGISTER:
m = "REGISTER";
break;
case NOTIFY:
m = "NOTIFY";
break;
case STATUS_ENQUIRY:
m = "STATUS_ENQUIRY";
cd->event = EV_STATENQ;
break;
case CONGESTION_CONTROL:
m = "CONGESTION_CONTROL";
break;
case INFORMATION:
m = "INFORMATION";
cd->event = EV_INFO;
break;
case STATUS:
m = "STATUS";
cd->event = EV_STATUS;
break;
default:
NDBGL3(L3_P_ERR, "unit %d, cr = 0x%02x, msg = 0x%02x", unit, cd->cr, message_type);
break;
}
if(m)
{
NDBGL3(L3_PRIM, "%s: unit %d, cr = 0x%02x\n", m, unit, cd->cr);
}
}
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